Revert "Fix AnimationBase::fractionalTime() to handle a scale of infinity"

This reverts commit 5de3eab66d4f41125af4871aec2c5c267fd16533.

This patch was triggering assertions in animation tests: http://goo.gl/I109YR

TBR=steveblock

Review URL: https://chromiumcodereview.appspot.com/24079004

git-svn-id: svn://svn.chromium.org/blink/trunk@157631 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove validate(Filter|Transform)Operations method in GraphicsLayer.

Both are not used.

BUG=N/A

Review URL: https://chromiumcodereview.appspot.com/24114003

git-svn-id: svn://svn.chromium.org/blink/trunk@157632 bbb929c8-8fbe-4397-9dbb-9b2b20218538